Injection nozzle for internal combustion engines

An injection nozzle for an internal combustion engine for use in a motor vehicle, the injection nozzle comprising

• a nozzle body (2) equipped with at least one injection opening (3),
• a nozzle needle (5) that is guided in a needle guide (6) of the nozzle body (2) and being able to control the injection of fuel through the at least one injection opening (3),
• a control piston (18) drive-coupled to an actuator (19) and having a first control surface (21),
• the nozzle needle (5) having a first compensator surface (16) or being drive-coupled to a compensator piston (32) having a first compensator surface (16),
• the first compensator surface (16) being hydraulically coupled to the first control surface (21) via a first hydraulic path (22),
• a second hydraulic path (29) is able to hydraulically couple the first control surface (21) to a supply line (9) that supplies highly pressurized fuel to the at least one injection opening (3),
• the first hydraulic path (22) leading through a first control chamber (23) that contains the first control surface (21), a first compensator chamber (24) that contains the first compensator surface (16), and a connecting line (25) that connects the first control chamber (23) to the first compensator chamber (24), and
• the control piston (18) having a second control surface (27) situated in a second control chamber (28) that communicates with the supply line (9).

An injection nozzle for an internal combustion engine for use in a motor vehicle, the injection nozzle comprising

• a nozzle body (2) equipped with at least one injection opening (3),
• a nozzle needle (5) that is guided in a needle guide (6) of the nozzle body (2) and being able to control the injection of fuel through the at least one injection opening (3),
• a control piston (18) drive-coupled to an actuator (19) and having a first control surface (21),
• the nozzle needle (5) having a first compensator surface (16) or being drive-coupled to a compensator piston (32) having a first compensator surface (16),
• the first compensator surface (16) being hydraulically coupled to the first control surface (21) via a first hydraulic path (22),
• a second hydraulic path (29) is able to hydraulically couple the first control surface (21) to a supply line (9) that supplies highly pressurized fuel to the at least one injection opening (3),
• the first hydraulic path (22) leading through a first control chamber (23) that contains the first control surface (21), a first compensator chamber (24) that contains the first compensator surface (16), and a connecting line (25) that connects the first control chamber (23) to the first compensator chamber (24),
• the compensator piston (32) having a second compensator surface (34) situated in a second compensator chamber (35) that communicates with the supply line (9), and
• the two compensator surfaces (16, 34) acting in opposite directions when subjected to pressure.

An injection nozzle for an internal combustion engine for use in a motor vehicle, the injection nozzle comprising

• a nozzle body (2) equipped with at least one injection opening (3),
• a nozzle needle (5) that is guided in a needle guide (6) of the nozzle body (2) and is able to control the injection of fuel through the at least one injection opening (3),
• a control piston (18) drive-coupled to an actuator (19) and having a first control surface (21),
• the nozzle needle (5) having a first compensator surface (16) or being drive-coupled to a compensator piston (32) having a first compensator surface (16),
• the first compensator surface (16) being hydraulically coupled to the first control surface (21) via a first hydraulic path (22),
• a second hydraulic path (29) is able to hydraulically couple the first control surface (21) to a supply line (9) that supplies highly pressurized fuel to the at least one injection opening (3),
• the control piston (18) and the compensator piston (32) are guided coaxially one inside the other,
• the first control surface (21) and the first compensator surface (16) are situated in a shared conversion chamber (43), and
• a second compensator chamber (35) embodied in the control piston (18) and communicating with the supply line (9) through the control piston (18).

An injection nozzle for an internal combustion engine for use in a motor vehicle, the injection nozzle comprising,

• a nozzle body (2) equipped with at least one injection opening (3),
• a nozzle needle (5) that is guided in a needle guide (6) of the nozzle body (2) and being able to control the injection of fuel through the at least one injection opening (3),
• a control piston (18) drive-coupled to an actuator (19) and having a first control surface (21),
• the nozzle needle (5) having a first compensator surface (16) or being drive-coupled to a compensator piston (32) having a first compensator surface (16),
• the first compensator surface (16) being hydraulically coupled to the first control surface (21) via a first hydraulic path (22),
• a second hydraulic path (29) is able to hydraulically couple the first control surface (21) to a supply line (9) that supplies highly pressurized fuel to the at least one injection opening (3),
• the control piston (18) and the compensator piston (32) being guided coaxially one inside the other,
• the first control surface (21) and the first compensator surface (16) being situated in a shared conversion chamber (43), and
• the second hydraulic path (29) leading through a compensator piston bypass (47) situated between the compensator piston (32) and a compensator piston guide (33).